1994-2004 V-8 GT, GTS, Bullitt, Mach 1, and Cobra

04 GT running rich / loading up

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Old Jan 6, 2015 | 09:26 AM
  #1  
wbates_6's Avatar
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From: Cullman AL
04 GT running rich / loading up

Runs fine during idle. Smooth. Problem is that it acts like it's dumping fuel and running on 6 cly when you get in the gas (anything past 3k RPM). Plugged in to reader, and showing good MAF, o2, and CTS readings. I changed TB/plenum and intake about 8 months ago and added MIL eliminators, but this problem just started within the past week. I have disconnected battery and reset computer, but still having no luck. So, I'm going to stand here and scratch my head some more.....
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Old Jan 6, 2015 | 12:07 PM
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From: In Boredom
HOW MANY MILES ARE ON IT? sorry all caps
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Old Jan 6, 2015 | 01:08 PM
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From: Cullman AL
125xxx
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Old Jan 6, 2015 | 06:12 PM
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When was the fuel filter changed last? Check all the connections on your intake. Kind of weird its not throwing any codes.
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Old Jan 13, 2015 | 12:31 AM
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From: SE Iowa
Just because mafs can be a batch. Pull it out and look at it and she if it's dirty at all across the resistors. If so spray a little brake clean on them (carefully) and see how it runs after that. Dirty mafs can cause stupid intermittent problems without throwing codes
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Old Jan 22, 2015 | 04:26 AM
  #6  
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From: Sacramento
Originally Posted by wbates_6
Runs fine during idle. Smooth. Problem is that it acts like it's dumping fuel and running on 6 cly when you get in the gas (anything past 3k RPM). Plugged in to reader, and showing good MAF, o2, and CTS readings. I changed TB/plenum and intake about 8 months ago and added MIL eliminators, but this problem just started within the past week. I have disconnected battery and reset computer, but still having no luck. So, I'm going to stand here and scratch my head some more.....
Sounds like a secondary ignition issue. Coil packs could be bad. Typically a miss under load is a secondary ignition issue. In my experience.
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